ForEachDirectory Sample

Updated: 5 December 2005
This code sample demonstrates how to create a custom enumerator and a custom user interface to set properties for the enumerator using the .NET Framework and managed code. This sample is not supported on IA64.

Running the Sample

If you already know how to locate, build, and install code samples, you can go directly to the section
testing , and read about how to configure and run the code sample.

Prerequisites

The ForEachDirectory sample requires that the following components are installed.

Samples are provided for educational purposes only. They are not intended to be used in a production environment and have not been tested in a production environment. Microsoft does not provide technical support for these samples.

Location

If the code sample was installed to the default location, the sample is located in the following directory:
C:\Program Files\Microsoft SQL Server\90\Samples\Integration Services\Programming Samples\Control Flow\ForEachDirectory Sample
The C# solution for the code sample is located in the CS directory, and the Visual Basic solution is located in the VB directory.
For information about the two-step process required to install the samples, see
Installing Samples. To obtain the latest version of the samples, including new samples released after the original release of SQL Server 2005, see
SQL Server 2005 Samples and Sample Databases (April 2006).

Building the Sample

If you have not already generated a strong name key file, use the following procedure to generate this key file.

To generate a strong name key file

To open a Microsoft Visual Studio 2005 command prompt, click Start, point to
All Programs, point to Microsoft Visual Studio 2005, point to Visual Studio Tools, and then click
Visual Studio 2005 Command Prompt.- or -To open a Microsoft .NET Framework command prompt, click
Start, point to All Programs, point to Microsoft .NET Framework SDK 2.0, and then click
SDK Command Prompt.

At the command prompt, use the change directory (CD) command to change the current folder of the command prompt window to the Samples folder. The key file that you create in this folder will be used by all Microsoft SQL Server 2005 code samples.
Note: To determine the folder where samples are located, click Start, point to
All Programs, point to Microsoft SQL Server 2005, point to Documentation and Tutorials, and then click
Samples Directory. If the default installation location was used, the samples are located in <system_drive>:\Program Files\Microsoft SQL Server\90\Samples.

At the command prompt, run the following command to generate the key file:sn -k SampleKey.snkImportant: For more information about the strong-name key pair, see "Security Briefs: Strong Names and Security in the .NET Framework" in the .NET Development Center on MSDN.

You will need the public key token from the key file in a subsequent step. To obtain the public key token, first extract the public key from the key file by running the following command at the command prompt:sn -p SampleKey.snk SampleKeyPublic.snk

Display the public key token by running the following command at the command prompt:
sn -t SampleKeyPublic.snk

Copy the public key token to the clipboard or save for later use.

To build the sample

Open Microsoft Visual Studio 2005.

From the File | Open menu, click Project and open the ForEachDirectory.sln in the desired Samples directory, which is CS for the C# language, or VB for the Visual Basic language.

In the Solution Explorer, select the ForEachDirectory.cs or ForEachDirectory.vb code.

In the code, locate the DtsTask attribute. In that line of code, replace the existing value of the public key token in the* UITypeName* attribute property in the IncrementTask.cs. The alphanumeric value after "PublicKeyToken =" should
be replaced with the one displayed in thesn -t command from a previous step.

Click Build / Build ForEachDirectory on the menu to build the DLL for the project.

Installing the DLL into the ForEachEnumerator folder and the Global Assembly Cache

This sample is provided in both Visual Basic and C#. To distinguish between the assemblies for each version of the sample, the name of the output assembly has CS or VB appended. After successfully building the component, the component must be copied to the
ForEachEnumerators folder, and then added to the Global Assembly Cache in order to use it in Business Intelligence Development Studio.

To install the component into the ForEachEnumerators folder

Copy the assembly (ForeachDirectoryCS.dll or ForeachDirectoryVB.dll) to the folder located at
%system%\Program Files\Microsoft SQL Server\90\DTS\ForEachEnumerators.

Open the directory for the global assembly cache at %system%\assembly. For most computers, this will be
C:\Windows\assembly.

Select the assembly in the first window, and then drag and drop it into the window that contains the
assembly folder.

To install the component into the Global Assembly Cache by dragging and dropping the assembly

Copy the assembly (ForeachDirectoryCS.dll or ForeachDirectoryVB.dll) to the folder located at
%system%\Program Files\Microsoft SQL Server\90\DTS\ForEachEnumerators.

Open the directory for the global assembly cache at %system%\assembly. For most computers, this will be
C:\Windows\assembly.

Select the assembly in the first window, and then drag and drop it into the window that contains the
assembly folder.

To install the component into the Global Assembly Cache by using gacutil.exe

Open a Command Prompt window.

Type the following command to install the C# version of the component and the user interface into the global assembly cache:**
gacutil.exe -iF "c:\Program Files\Microsoft Sql Server\90\DTS\ ForEachEnumerators\ForEachDirectoryCS.dll"

Type the following command to install the Visual Basic version of the component and the user interface into the global assembly cache:**
gacutil.exe -iF "c:\Program Files\Microsoft Sql Server\90\DTS\ForeachEnumerators\ForeachDirectoryVB.dll"Note For simplicity, the user interface for this sample has been put in the same project as the task code; therefore, copying the DLL into the assembly directory is all that is required. If you decide to code the user interface in a different project,
then you must add the DLL that contains the user interface to the global assembly cache, in addition to the DLL that contains the code. Only the code must be compiled into a specific directory, however.

After you complete these steps the enumerator is available in the For Each Loop Editor of the For Each Loop container.

To use the sample in Business Intelligence Development Studio

Open Business Intelligence Development Studio.

From the menu, click File / New / Project.

From the New Project dialog box, in the Project Types, click
Business Intelligence Projects and in the right pane, click Integration Services Project.

In the Name box, type ForEachDirectory as the name for the new project.

In the Location box, select the location where you want to save the file. Click
OK.

From the Solution Explorer dialog box, double-click Package.dtsx.

In the Location box, select the location you want to save the file to. Click
OK.

From the Solution Explorer dialog box, double-click Package.dtsx.

Add the ForEachLoop container to the Control Flow surface of a package.

Open the Foreach Loop Editor by double-clicking the ForEachLoop container added in step one.

Click the Collection node, and select the ForEachDirectory enumerator from the Enumerator dropdown.

Specify the values of the properties of the ForEachDirectory enumerator, and then click
OK.

Testing the Sample

After you have added the sample component to a Data Flow task in a package, you can configure it in SSIS Designer. The ForEachDirectory enumerator has five properties that control its execution behavior.

Property

Description

RootDirectorySource

Specifies the source for the RootDirectory property which can be set by a ConnectionManager, Variable, or DirectInput.

RootDirectory

Specifies the directory where the enumerator begins its enumerating.

IncludeRootDirectory

Specifies whether the root directory is included in the directories that are enumerated.

EnumerateSubFolders

Specifies whether the subfolders of the folders that is contained in the root directory are enumerated.

SiblingFoldersBeforeSubFolders

When EnumerateSubFolders is true, specifies whether the enumerator enumerates the sibling folders first, or whether the complete directory structure is enumerated first.

Change History

Release

History

17 July 2006

5 December 2005

New content: Incorporated instructions on how to use the sample in Business Intelligence Development Studio. Added table describing the properties found in the custom user interface.